Solve using the addition and multiplication principles together.2r + 2 = 12
A. 12
B. 4
C. 8
D. 5
Answer: D
Mathematics
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For the curve r(t), find an equation for the indicated plane at the given value of t.r(t) = (t - 6)i + (ln(sec t) - 3)j + 9k, -?/2 < t < ?/2; normal plane at t = 2?.
A. x = 2? + 6 B. x = -2? - 6 C. x = 2? - 6 D. x = 6 - 2?
Mathematics
Evaluate.80 + (-12)0
A. 0 B. 2 C. -4 D. 1
Mathematics
Find the exact value of the expression.sin 250° cos 10° - cos 250° sin 10°
A. - 
B. 
C. 
D. - 
Mathematics
Determine whether or not the function is one-to-one.f(x) = 7x2 - 1
A. Yes B. No
Mathematics